:root {
  font-family: system-ui, Avenir, Helvetica, Arial, sans-serif;
  line-height: 1.5;
  font-weight: 400;

  color-scheme: light dark;
  color: rgba(255, 255, 255, 0.87);
  background-color: #242424;

  font-synthesis: none;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  font-weight: 500;
  color: #646cff;
  text-decoration: inherit;
}
a:hover {
  color: #535bf2;
}

body {
  margin: 0;
  display: flex;
  place-items: center;
  min-width: 320px;
  min-height: 100vh;
}

h1 {
  font-size: 3.2em;
  line-height: 1.1;
}

button {
  border-radius: 8px;
  border: 1px solid transparent;
  padding: 0.6em 1.2em;
  font-size: 1em;
  font-weight: 500;
  font-family: inherit;
  background-color: #1a1a1a;
  cursor: pointer;
  transition: border-color 0.25s;
}
button:hover {
  border-color: #646cff;
}
button:focus,
button:focus-visible {
  outline: 4px auto -webkit-focus-ring-color;
}

@media (prefers-color-scheme: light) {
  :root {
    color: #213547;
    background-color: #ffffff;
  }
  a:hover {
    color: #747bff;
  }
  button {
    background-color: #f9f9f9;
  }
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html, body {
  height: 100%;
  width: 100%;
}

#root {
  height: 100%;
  width: 100%;
}

/* 移动端点击高亮清除 */
* {
  -webkit-tap-highlight-color: transparent;
}

/* 移动端滚动优化 */
* {
  -webkit-overflow-scrolling: touch;
}

/* 禁止文字选择 */
* {
  user-select: none;
}

/* 允许输入框文字选择 */
input, textarea {
  user-select: text;
}

/* 设置基准字体大小 */
html {
  font-size: 16px;
}

/* 使用rem单位的示例类 */
.rem-example {
  /* 1rem = 100px (在375px设计稿下) */
  width: 0.16rem;  /* 16px */
  height: 0.16rem; /* 16px */
  font-size: 0.14rem; /* 14px */
  padding: 0.1rem;  /* 10px */
}
